Well, IMO the point of the other community is not "get off the meme we don't want you", it's more "this is not really what the kink meme is for, but here is another site you can go where other interested people also go".

So I don't see anything wrong with poking anons (or poking the mod to poke anons, I guess?) to let them know there's another community. It's like community promo.